Missed birth control, HELP!

Meagan
I'm 23 and I have been on birth control since I was about 16-17 years old. I have been taking it religiously, and I usually don't miss a pill. I take it around 8pm every night. But I had a hectic day and I missed my pill on the 4th and had sex, and he came inside me. And I was ovulating. I took my pills everyday and on time since the start of this pack. And I'm in the middle of my pack now. Should I be worried about a pregnancy? I took two pills the next day, the 5th. Help!